DESCRIPTION The main body ECU (multiplex network body ECU) detects a high beam headlight illumination request signal of the automatic high beam system from the forward recognition camera.
WIRING DIAGRAM 
PROCEDURE
(a) Check the forward recognition camera system. Click here
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Toyota Tundra Service Manual > Headlight Assembly(for Led Headlight): Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE RADIATOR GRILLE SUB-ASSEMBLY 2. REMOVE FRONT END PANEL LH 3. REMOVE HEADLIGHT ASSEMBLY LH (a) Apply protective tape around the headlight assembly L ...
